Lubricant compressor



Filed Feb. 20. 1922 D. F. FESLER LUBRICANT COMPRESSOR Jim 12, 192s.

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Patented .lime 12, 1928.

UNITEDI STATES PATENT orricr..

DOUGLAS F. FEHLER, .OF CHICAGO, ILLINOIS, ASSIGNOB TO THE BASSICK HLNUFAC- TUBING CO., OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

LUBBICANT coxrnasson.

application nieu February ao, issie. amai m. 537,870.

My invention relates to improvements in lubricant compressors, and is particularly concerned with the provision of a lubricant 4compressor capable of delivering a comparatively large quantity of lubricant under high pressure in a short period of time.

The objects of my invention are First: To provide a lubricant compressor comprising a low pressure cylinder, a high pressure cylinder communicating with said loT ressure c linder, a lubricant expelling member in eac of said cylinders, and common means for actuating said expelling members;

Second: To provide a lubricant compressor of the character described comprising other means, separate and distinct from they common means for actuating the two lubricant expelling members, for actuating the lubricant expelling member in the low pressure cylinder;

Third: To provide a lubricant compressor which can be refilled without removing the lubricant expelling member therefrom;

Fourth: To provide a lubricant compressor of the character described comprising a cylinder having a removable closure, a piston mounted in said cylinder, and means for moving said piston toward said removable closure` for placing the lubricant under cornpression; y

Fifth: To provide a lubricant compressor, such as described, comprising means for returning tlie lubricant expelling member in the low pressure cylinder to its initial posi-V tion without actuating the high pressure cylinder mechanism;

Sixth: To provide a lubricant compressor,

such as described, comprising improved means for removing the closure for the purpose of refilling the compressoi, and

-Seventh: To provide a compound compresser in which the high pressure cylinder is of the valveless type.

Other objects will appear as this descrip- -tion progresses. reference bein had to the accompanying drawings in 4w ich Figure 1 is a vertical central longitudinal section through my improved compressor.

Figure is a sectional detail taken on line 2-2 of Figure 1 A',

Fi ure 3vis a vertical section taken on line 3 of Figure 1, and

Figure 4 is a view showing a modified form of one of the details of my improved construction.

Throughout the several views, similar characters of reference are used for referring t similar parts, and the sections are taken looking in the direction oi' the small arrows.

Referring to the drawings, my improved compressor comprises a c lindrical barrel 5, one end of which is closed by the base plate 6, and the other end of which is closed by the removable closure 7, which has spaced downwardly depending 1u s 8 carrying set screws 9, by means of whic the closure can be detachably secured to the upper end of the barrel 5, which is swaged outwardly slightly at its top, to provide an abutment for the inner ends of the set screws 9,

A cup leather 1() is secured to the removable closure 7 by means of the rin 11 and the screws 12 w ich extend throug the removable closure. The cup leather 10 provides means for sealing the 'oint between the barrel 5 and the remova le closure 7.

I prefer to secure the lower end of the barrel 5 to the base plate 6 by first providing the base plate 6 with a circular undercut recess 13 into whichV the lower end of the barrel 5, after having been swaged outwardly as shown at 14, is inserted and held in place by solder, lead, or babbitt 15, which can be melted and poured into the space between the portion 14 of the barrel 5 and the flan e 16 formin the undercut recess of the ase plate. he ring 15 could also be formed by hammering a copper or lead strip into place. The base plate 6 is provided with an extension 17 having a roughened surface 18.` The operator in operating my improved compressor, in a manner about to be described, places his foot upon the extension 17 to hold the compressor against movement.

22 carries a piston comprising the cup leather 23, face plate 24, and a back plate 25, all' three of which are secured together by means of rivets 26. The ensemble thus produced is secured to` the lower reduced end portion 27 of the piston rod 22 by means of a nut 28.

For rotating the sleeve or nut 19, I secure a bevel gear 29 to its upper end by means of the key 30, or in any other suitable manner. This gear meshes with a corresponding bevel gear 31 which is keyed and secured to the inner end of the shaft 32, to the outer end of which is attached a handle 33. A bracket 34 projects upwardly from the closure 7 and has formed therein a bearing 35 for receiving the shaft 32.

A ratchet wheel 36 is secured to the hub of the bevel gear 31 b pins 37. For rotating the ratchet whee and through it ther twogears 3 1 and 29 and the nut 19, for the purpose of moving the piston rod 22, I provide the lever 38, the inner bifurcated end of which is pivotally mounted upon the upper end of the bracket 34 by means of the pin 39. A pawl comprising the two bars 40 and 41 is rotatably and loosely mounted upon the projecting end of the pin 42 which extends through both bifurcations of the lever 38. The lower end of the bar 40 is provided with a tooth 43 for engaging the teeth of the ratchet wheel 36, and the lower end of the bar 41 is slotted for the purpose of receiving the pin 43 which projects from an upstanding lug 44 carried by the closure A spring 45, confined between the lower end of the bar 41, and a pin 46v passing through the pin 43, provide means for yield- 'take for the high pressure cylinder.

ingly holding the tooth 43 in contact with the ratchet wheel. As stated above, the two bars 40 and 41 are loosely mounted upon the pin 43. This feature is to permit the tooth 43 to ratchet over the teeth of the ratchet wheel 36.

The high pressure element of my compound compressor comprises the cylinder 47 which is formed in the -two bosses 48 and 49 formed on opposite sides of the closure 7. The lower end of the cylinder 47 is permanently closed by a plug 50. An aperture 51 formed in the wall of the cylinder 47, adjacent the closure 7, provides the in- An aperture 52 formed in the wall adjacent the lowerA end of the cylinder 47 communicates with the outlet duct 53 likewise formed in 'the lugs 48 and 49.- `A flexible conduit-54 may be secured to theouter end of the outlet duct 53 by means of any suitable coupling 54, and may be used for conducting the lubrlcant to the place lto be lubricated. I preferably provide the outer end of the conduit 54 with a coupling member 55 adapted to be connected with the nipples or fittings forming a part of a well known high presramona sure lubricating system, these nipples or {it-v tings each being permanently secured to a bearing to be lubricated. v

'A plunger 56 is reciprocally mountedin the cylinder 47 and its upper end is threaded into a bifurcated cross head 57. A link 58 has its lower end pivot'ally connected with the cross head 57 by means of the pin 59, and its upper end pivotally' connected with the lever 38 by `means of the pin 60 which extends through the two bifurcations of the inner end of the lever 38.

I provide the closure with a vent cock 6l, the discharge end of which is so fashioned that, if desired, it may be connected with the inner end of the discharge conduit 54, or any other discharge conduit. j

A lug 62, projecting inwardly from the closure 7 is adapted to engage the face plate 24 of the piston when the latter is lifted and prevent the piston from being subjected to a twisting strain by coming into contact with the lower end of the cylinder 47, the cylinder 47 and the lug 62 projecting inwardly from the closure 7 substantially the same distance.

To prevent the formation of a vacuum in the lower end of the cylinder 5 when the piston is raised, I provide the opening 63 in the base plate, this opening being closed by the valve 64 which is yieldingly held closed by a spring 65, confined between the valve and an apertured plug 66.

In operation, when it is desired to lill my improved compressor, the pawl tooth 43 is held out of engagement with the ratchet wheel 36, and the handle 33 rotated in the proper direction to move the piston downwardly. Previously to this, the set screws 9 have been loosened so that when the lower end of the piston rod 22 engages the `base plate 6, continued rotation of the handle 33 will cause the removable closure 7 to be lifted upwardly until it can be completely removed from the threaded piston rod 22. The barrel 5 is then substantially iilled with lubricant. The sleeve 19 is then brought into registry with 4the upper end of the threaded'piston rod 22, and the handle 33 is rotated to lower the closure 7 into position on the upper end of the barrel 5. The set screws can then be turned to clamp the closure 7 to the upper end of the barrel. The pet cock 61 is then opened and the handle' 33 rotated in theopposite direction until lubricant begins to flow from the pet cock, after which the latter is closed. At this stage in the operation, substantially all'the air trapped in the upper end of the cylinder 5 has been displaced from the cylinder. The lever 38 can then be moved upwardly and downwardly. The downward movement of the lever causes the pawl tooth 43 to engage with the ratchet wheel 36, thus turning the ratchet Wheel., bevel gear 31,

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bevel gear 29 and the sleeve 19, and causing the piston to be moved upwardly, thus placing the lubricant in the barrel 5 under compression; At the same time, the plunger 56 moves downwardly in the cylinder 47, thus discharging the lubricant from the cylinder 47 through the aperture 52, the outlet duct 53 and discharge conduit 54.

l/Vhen thehandle 38 is lifted upwardly through its 'full stroke, the port 5l will be uncovered, thus permitting the lubricant previously compressed in the cylinder 5 to flow into the cylinder 47. lt might be explained here that in filling the cylinder 5, there is always a considerable amount of aii` trapped in the grease, and that as the piston in the barrel 5 moves upwardly, it places this air under compression so that when the plunger 56 is lifted sufficiently to uncover the port 51, the air, expanding, forces the lubricant into the cylinder 47, thus priming thehigh pressure cylinder.

The length of the bar 40 is made so that the tooth 43 is brought into engagement with the ratchet wheel 36 only during the last portion of the movement of the handle 38. This means that the plunger 56 can be actuated through a portion of its stroke without .actuating the ratchet wheel. This feature is of convenience if, forany reason, the piston in the cylinder 5 has moved up so rapidly, compared with the discharge from the cylinder 47, that further movement of the piston in the cylinder 5 will become difficult. By reciprocating the plunger 56 through several partial strokes, the pressure in the barrel 5 can be relieved without moving the piston in this barrel upwardly. Thexsame effect, namely, the reduction of thepressure in the cylinder 5 can be accomplished by turning the handle 33 to slightly lower 'the piston in the barrel 5. Reduction of the pressure in the barrel 5 can also be effected by opening the vent cock 61 and permitting .a slight amount of lubricant to be discharged therefrom.

Where it is desired to dispense-a comparatively large amount of lubricant under comparatively low pressure, this can be ac- `coinplished in one of two different ways.

In the first place, the handle 38 can be lifted sufficiently to cause the lunger 56 to uncover the intake port 51 o? the cylinder 47, and the handle 33 can then be turned to raise the piston in the barrel 5. If for 'any reason this method is not practicable, then the pet cock 61 can be openedv and the handle turned to raise the piston in the barrel 5. Ifde-` sired, a conduit similar to 54 can be connected with the vent cock 61.

From the above description, it will be apparent that in the operation of my improved compressor, no longitudinal strains are exerted upon the cylinder 5, nor is there any strain tending to displace the closure 7 from the barrel 5. As a result of this construction, substantially the only function of the set screws 9 is to prevent the closure 7 from rotatin and from tipping on the upper end of the arrel.

If for any reason the ltravel upwardly of the piston in the barrel 5 is so rapid, as compared with the discharge of lubricant through the high pressure cylinder, that there is a tendency for this piston to place the lubricant inthe barrel 5 under excessivelv high pressure, tending to make the operation of the pump difficult, means other than those describedI above can be provided for automatically preventing this condition. These means I have illustrated in Figure 4, where the bar 41 is illustrated as having an upwardly directed extension 70, to the outwardly turned end 71 of which is secured one end of a tension spring 72, the other end of which is secured to the pin 42. Both the bar 40 and the bar 41 are provided with registering slots 73; through which the pin 42 passes, and which permits the reciprocation of the bars 40 and 41 relative to the pin 42.

In the above described construction, the tension of the spring 72 is made such that it Awill not materiallylen then or expand as long as the pressure in t e cylinder 5 does not exceed a predetermined pressure, but as soon as the pressure in the cylinder 5 exceeds this amount., the spring 72 will yield, thus preventing the movement of the handle 38 from being communicated to the ratchet wheel 36. As soon as sufficient lubricant has been discharged through the high' pressure cylinder to lower the pressure in the cylinder 5 to the predetermined pressure, t

e springl 72 will again cease to yield or p the ratchet, and thus cause the piston to move upwardly in the cylinder5 so as to prime the high pressure cylinder.

While I have described the details of construction of the preferred embodiment of my invention, it is to be clearl understood that my invention is not limited to these details, but is capable of other adaptations and modications within the scope of the appended claims.

Having thus described my invention, what I claim is 1. A lubricant dispenser comprising a cylindrical barrel having a closure at each end, one of said closures being removably secured to said barrel and provided with a vent cock, a cup leather for sealing the joint between said barrel and said removable closue, a nut rotatably 'mounted in said removable closure, a Vthreaded piston rod projecting through said nut and into said barrel, a piston, comprising a cup leather, carried by the inner end of said piston rod, a

by said lever for engaging said ratchet Wheel, means connected with said pawi for causing itto yield under a predetermined pressure exerted on said pawl, a valveless pump cylinder carried by said removable closure, said cylinder projecting and opening into the space between said removable closure and said piston, and a plunger operating in said pump cylinder and operably connected With said lever.

2. A lubricant dispenser comprising a cylindrical barrel having a closure at each end, one of said closures being removably secured to said barrel, a cup leather for sealing the joint between said barrel and said removable closure, a nut rotatably mounted in said removable closure, a threaded piston rod projecting through said .nut and into said barrel, a piston, comprising a cup leath er, carried by the inner end of said piston rod, a bevel gear secured to said nut, a second bevel gear engaging said first named bevel gear, a handle for turning said second gear, a ratchet Wheel secured to said second bevel gear, a lever pivoted on an axis'extending transversely of said barrel, a pawl carried by saidlever for engaging said ratchet. Wheel, a pump cylinder carried by said removable closure, said cylinder projecting and opening into the space between said removable closure and said piston, and

a plunger operating in said pum cylinder and operably connectedwith sai lever.

3. A lubricant dispenser comprisinga cylindrical barrel having a closure at each end, one of said closures being removably secured to said barrel, a nut rotatably mounted in said removable closure, a threaded piston rod projecting through said nut and into said barrel, a piston, comprising a cup leather, carried by the inner end of said piston rod, a bevelgear secured to said nut, a second bevel gear engaging said first named bevel gear, a ratchet wheel secured to said second bevel gear, a lever, a pawl' carried by said lever for engaging said ratchet Wheel, a pump cylinder carried by said. removableclosure, said cylinder projecting andvopening into the space between .said removable closure and said piston, anda plunger operating in said pump cylinder and operably connected with' said lever.

v4. A lubricant dispenser comprising a'cycured to said nut, a second bevel `gear engaging said first named bevel gear, a handle for v turning said second gear, a ratchet Wheel secured to said second bevel gear, a lever, a pawl carried by said lever tor engaging' said ratchet wheel, a `pump cylinder pro-l jecting and opening into the space between said removable closure and said piston, and a plunger operating in said pump cylinder and operably connected with said lever.

5. A lubricant dispenser comprising a cylindrical barrel having -a closure removably secured to said barrel, a nut rotatably mountcd in said removable closui'e, a threaded pistonv rod projecting through said nut and into said barrel, a piston carried by the inner end of said piston rod, a bevel gear secured to said nut, a second bevel gear engaging said first named bevel gear, aratchet wheel secured to said second bevel gear, a lever, a paivl carried by said lever for engaging said ratchet wheel,a pump cylinder projecting and opening` into the space betiveen said removable closure and said Apiston, and a pluiigei' operatingin said pump cylinder and opel-ably connectedwith said lever.

6. A lubricant dispenser comprising a cylindrical barrel having a closure removably secured to said barrel, a piston rod, projecting through said removable closui'e, a piston carried by theinner end of said piston rod, a high pressure pump cylinder vcarried by said removable closure, said pump cylinder y projecting and opening into the 'spacev be tween said piston and said removable closure, a plunger operable in said pump cylinder, means for actuating said plunger, and means operable by said last named means for actuating said threaded piston rod.

'a'. A lubricant dispenser comprising a cylindrical barrel having a closure, a'piston rod projecting through said closure, a piston carried by the inner end of said piston rod, a high pressure pump cylinder projecting and opening into the space between said piston and said removable closure, aplunger operable in said pump cylinder, and -means for concurrently actuating. said plunger and for moving said piston rod toward said closure.

8. A lubricant dispenser comprising a cy lindrical barrel having a closure, a piston rod projecting through said closure, a piston carried by the inner end of said piston rod, a -high pressure pump cylinder projecting and opening into the space between' said piston and said closure, a plunger operable in said pump cylinder, and common means for actuating said plunger and for moving said c piston toward said closure. 9. A lubricant dispenser comprising a bar rel having a closure at one end, a piston rod projecting through said removable closure and into said barrel, a piston carried by the mon means for actuating said piston rodand said high pressure pump.

10. A lubricant compressor comprising a low pressure cylinder, a. base plate for closing one end of said low pressure cylinder and a removable closure for the other end of said'low pressure cylinder, a piston slidably mounted in said cylinder. a tubular member carried by said removable closureand forming a high pressure cylinder. the said high pressure cylinder communicating with said low pressure cylinder. a plunger reciprocably mounted in said high pressure cylinder, and common means for actuating said piston and said plunger.`

11. A lubricantI compressor comprising a low pressure cylinder. a base plate for closing oneend of said low pressure cylinder, and a closure for the other end of said low pressure cylinder, a piston slidably mounted in said cylinder, a high pressure cylinder communicating with said low pressure cylinder. a plunger reciprocably mounted in said high pressure cylinder, and common reeiprocatory means for alternatively actuating said piston and said plunger to expel lubricant from said cylinder.

l2. A lubricant compressor comprising a cylinder, a removable closure therefor. an abutment on said cylinder. a piston. means connecting said closure and piston for moving said piston toward said closure to expel the contents of the cylinder, or away from said closure to strike said abutment and lift the closure'otl' the cylinder, and means for disconnecting said connecting means.

13. A lubricant compressor comprising a cylinder, a removable closure therefor, an abutment on said cylinder, a piston, and

means connecting said closure and piston t'or moving said piston toward said closure to expel the contents of the cylinder. 'or away from said closure to strike said abutment and lift the closure olf the cylinder.

14. A lubricant compressor comprising a p low pressure cylinder, a removable closure ward said closure to expel the contents of said cylinder, a permanent closure for the other end of the cylinder, an air 4vent in said closure, an inwardly opening check valve for said vent, a high pressure cylinder carried by said removable closure and projecting into said low pressure cylinder, a lu upon said removable closure to engage sai low pressure piston at the saine time as the high pressure cylinder, a reciprocatory operating means for said high pressure cylinder, and a load and displacement sensitive trans# mission from said operating means to said low pressure piston, said transmission being operative only below a certain load and upon full stroke actuation Vof Vsaid operating means.

15. A lubricant compressor comprising a low pressure cylinder, a closure therefor, a lowpressure piston to expel the contents of said cylinder a high pressure cylinder, ca rried by said closure and projecting into said low pressure cylinder, and a. lug uponsaid closure to engage said low pressure piston t the same time as the high pressure cylin- 16. A lubricant compressor comprising a low pressure cylinder, a low pressure piston, a high pressure cylinder, reciproca.tory oper ating means for said high pressure cylinder, and a displacement sensitive transmission from said operating means to said low, pressure piston, said transmission being opera-- tive only upon full stroke actuation of said operating means.

17; A lubricant compressor comprising a reservoir, a high pressure cylinder communieating therewith, reciprocatory manually actuated means in said high pressure cylinder for taking in lubricant from said reservoir and expelling it from said high pressure cylinder, said means being operative by movement 'through either full stroke or a partial stroke, and means actuated only by a full stroke for developing low pressure in said reservoir.

In witness whereof, I hereunto subscribe my name.

DOUGLAS F. FESLER. 

